Thanks for the resource. I noticed on level 4, "amazing grace song", it is in 3/4 time and some of the measures have a half note with a triplet. If im not mistaken, I think that should be a dotted quarter note with a triplet so that it can equal three counts. I figured it was done this way for practical purposes. Regardless, this a very good resource. I definently need to work on my sight reading.
Actually, the sheet music is correct. In 3/4 time, a triplet is played on one beat; a half note is two beats, and a dotted quarter note equals one and a half beats. To get three beats, you need a half note and a quarter note, or in this case a triplet.